ONOS-2186 - GUI Topo Overlay - (WIP)
- split BiLink into abstract superclass and concrete subclasses.
- created BiLinkMap to collate bilinks (and derivative subclasses).
- added missing Javadocs, and other general cleanup.

Change-Id: Icfa85bc44a223c6cf245a4005170583dad1cc801
diff --git a/core/api/src/main/java/org/onosproject/ui/topo/HostHighlight.java b/core/api/src/main/java/org/onosproject/ui/topo/HostHighlight.java
index ff8b3be..cb64e07 100644
--- a/core/api/src/main/java/org/onosproject/ui/topo/HostHighlight.java
+++ b/core/api/src/main/java/org/onosproject/ui/topo/HostHighlight.java
@@ -18,7 +18,7 @@
 package org.onosproject.ui.topo;
 
 /**
- * Denotes the types of highlight to apply to a link.
+ * Denotes the highlighting to apply to a host.
  */
 public class HostHighlight extends AbstractHighlight {
 
@@ -26,5 +26,8 @@
         super(TopoElementType.HOST, hostId);
     }
 
+    // TODO: implement host highlighting:
+    //   - visual highlight
+    //   - badging
 
 }